Apple also wowed Wall Street with strong growth of its Mac computers, iPads and services division. And the company has more than $268 billion in cash that it can use for future investments, higher dividends and bigger stock buybacks.

Apple's shares are now up nearly 50% this year, making it one of the best performers in the Dow. But it's not the only tech giant that's posting eye-popping numbers.

Google owner Alphabet(GOOGL, Tech30) is up more than 30% this year. The company is now worth more than $715 billion. Microsoft(MSFT, Tech30) has surged 35% and has a market value of nearly $650 billion.

Amazon(AMZN, Tech30) has shot up 45% and is now worth more than $525 billion. Facebook(FB, Tech30) has soared 55% and has a market value of about $520 billion.

And China's Alibaba(BABA, Tech30) has more than doubled this year and is approaching a half a trillion dollar market cap, too.